node/test/common/countdown.js
Rich Trott c506660f32 test: put common lint exceptions into config file
For lint exceptions that are universal or near universal for
`test/common`, put the exceptions in a config file rather than disabling
the ESLint rules at the top of each file.

PR-URL: https://github.com/nodejs/node/pull/39358
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
2021-07-13 17:49:31 -07:00

29 lines
590 B
JavaScript

'use strict';
const assert = require('assert');
const kLimit = Symbol('limit');
const kCallback = Symbol('callback');
const common = require('./');
class Countdown {
constructor(limit, cb) {
assert.strictEqual(typeof limit, 'number');
assert.strictEqual(typeof cb, 'function');
this[kLimit] = limit;
this[kCallback] = common.mustCall(cb);
}
dec() {
assert(this[kLimit] > 0, 'Countdown expired');
if (--this[kLimit] === 0)
this[kCallback]();
return this[kLimit];
}
get remaining() {
return this[kLimit];
}
}
module.exports = Countdown;